<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>

    <%if(flag){%>
    <h1>天庆</h1>
    <%}%>
    <h2><%=foo%></h2>
    <%for(var i=0;i<arr.length;i++){%>
    <li><%=arr[i]%></li>
    <%}%>


</body>

</html>